Specifies the Session Creation Request Message.Specifies the Response message for Session Creation Request. If an error occurs, then at least one Parameter element SHALL be present in the response.Specifies the created session informationIf this element is present, it signals that there was an error w.r.t. to a parameter in the request.Specifies the Session Deletion MessageSpecifies the response message for Session DeletionSpecifies the File Insertion MessageSpecifies the response message for File InsertionSpecifies the File Removal MessageSpecifies the response message for File Removal